Mg-81

[fat tony]

WWII Luftwaffe machinegun derived from the MG-34 by Mauser.

This sounds nasty:

http://en.wikipedia.org/wiki/MG_81_machine_gun

Another application was the Gießkanne, (Watering can), an externally mounted pod with three gun pairs, making a total of six guns and their ammunition. Able to fire 9000 rounds per minute, this was attached to a Junkers Ju 88 and used to strafe ground targets

 

[Kevin M.]

Wowzers. 9000 rpm of mm would make it a bad day for anything in its way.

 

[fat tony]

About like the AN-M2!